Defining the Leak from the liquid side of the wagon

Insert a Leak Scenario under the Equipment node and name it 1 inch, liquid. For a release from the body of a vessel rather than from attached pipework, you should use a Leak Scenario. It will give a larger discharge rate than a Short pipe Scenario since there are no frictional losses during the flow to the leak-location.

The leak is assumed to be at the bottom of the tank, which is the most conservative assumption for the tank head and the duration.

Edit the Scenario, and set the data as follows:

Defining the Fireball Failure under Flame Impingement

Note: this section is not relevant to Phast Lite, as the Standalone Scenarios are not available in Phast Lite.

The program allows you to model immediate-ignition effects from fireballs and poolfires on their own, separated from any modelling of dispersion and delayed-ignition effects, and you do this by using the Fireball Scenario or Pool Fire Scenario under a Standalones Equipment item rather than one of the discharge Scenarios under the Pressure Vessel or Atmospheric Storage Tank items.

Defining a Standalones Equipment item

Select the Tank wagons folder then select the option to insert a Standalones Equipment item. The GIS Input View will become selected, and you should click on the map somewhere next to the dot for the tank wagon pressure vessel item; you will adjust the location as necessary in the next step.

Name the Standalones node Propane wagon, then open the input dialog and set the data as follows: